/*
 *    Copyright 2006-2020 the original author or authors.
 *
 *    Licensed under the Apache License, Version 2.0 (the "License");
 *    you may not use this file except in compliance with the License.
 *    You may obtain a copy of the License at
 *
 *       http://www.apache.org/licenses/LICENSE-2.0
 *
 *    Unless required by applicable law or agreed to in writing, software
 *    distributed under the License is distributed on an "AS IS" BASIS,
 *    WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 *    See the License for the specific language governing permissions and
 *    limitations under the License.
 */
package org.mybatis.generator.api.dom.kotlin;

import java.util.Objects;
import java.util.Optional;

public class KotlinProperty extends KotlinNamedItem {

	private final String dataType;
	private final String initializationString;
	private final Type type;

	public enum Type {
		VAL("val"), //$NON-NLS-1$
		VAR("var"); //$NON-NLS-1$

		private final String value;

		Type(String value) {
			this.value = value;
		}

		public String getValue() {
			return value;
		}
	}

	private KotlinProperty(Builder builder) {
		super(builder);
		dataType = builder.dataType;
		initializationString = builder.initializationString;
		type = Objects.requireNonNull(builder.type);
	}

	public Optional<String> getInitializationString() {
		return Optional.ofNullable(initializationString);
	}

	public Optional<String> getDataType() {
		return Optional.ofNullable(dataType);
	}

	public Type getType() {
		return type;
	}

	@Override
	public <R> R accept(KotlinNamedItemVisitor<R> visitor) {
		return visitor.visit(this);
	}

	public static Builder newVal(String name) {
		return new Builder(Type.VAL, name);
	}

	public static Builder newVar(String name) {
		return new Builder(Type.VAR, name);
	}

	public static class Builder extends AbstractBuilder<Builder> {
		private String dataType;
		private String initializationString;
		private final Type type;

		private Builder(Type type, String name) {
			super(name);
			this.type = type;
		}

		public Builder withInitializationString(String initializationString) {
			this.initializationString = initializationString;
			return this;
		}

		public Builder withDataType(String dataType) {
			this.dataType = dataType;
			return this;
		}

		public Builder getThis() {
			return this;
		}

		public KotlinProperty build() {
			return new KotlinProperty(this);
		}
	}
}
